J/A+A/334/609 Carbon stars IR photometry (Guglielmo+ 1998)
Infrared carbon stars: new identifications and their space distribution
in the Galaxy
Guglielmo F., Le Bertre T., Epchtein N.
<Astron. Astrophys. 334, 609 (1998)>
=1998A&A...334..609G 1998A&A...334..609G (SIMBAD/NED BibCode)
ADC_Keywords: Stars, carbon ; Photometry, infrared ; Cross identifications
Keywords: stars: carbon - stars: circumstellar matter - stars: late-type -
stars: AGB and post-AGB - Galaxy: stellar content - infrared: stars
Abstract:
We present JHKL photometry of a sample of 150 IRAS stars in the third
and fourth galactic quadrant with |b|<2° selected according to
their IRAS colour (0.160≤[12-25]≤1.156). We identify 27 carbon star
candidates using the [12-25] vs. K-L two-colour diagram method. Among
them, 10 are listed in the Stephenson's catalogue of carbon stars and
17 are new infrared carbon stars (IRCS) candidates. Their distances
are found to be larger than 3kpc. These data are combined with
previous data to study the space distribution of IRCS. The number
density seems to be independent of the galactocentric distance (R)
toward the Galactic Center and to decrease exponentially toward the
anticenter. At the present stage, it is not possible to disentangle
effects such as incompleteness of the sample, different space
distribution law and dependence of the luminosity on metallicity. In
particular, we suggest that the apparent scarcity of IRCS in the
central direction of the Galaxy (R<5kpc) might be due to a selection
effect. From the available data, we have found no IRCS within 1kpc of
the Galactic Center.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 56 150 Observations
table4.dat 66 60 Identifications
tables.tex 79 366 LaTeX version of the tables
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See also:
II/125 : IRAS catalogue of Point Sources, Version 2.0 (IPAC 1986)
III/197 : IRAS Low Resolution Spectra (IRAS team, 1987)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS Name
12- 16 F5.2 mag Kmag K magnitude
18- 21 F4.2 mag J-K ? J-K colour index
23- 26 F4.2 mag H-K ? H-K colour index
28- 31 F4.2 mag K-L K-L colour index
33- 36 F4.2 mag [12-25] Infrared [12-25] colour index
38- 42 F5.2 mag [25-60] ? Infrared [25-60] colour index
45- 46 I2 --- IRASClass ? IRAS Low Resolution Spectrometer class
(Olnon et al., 1986A&AS...65..607O 1986A&AS...65..607O)
48- 49 A2 --- ValClass Valinhos class (Epchtein et al.
1987A&AS...71...39E 1987A&AS...71...39E)
51- 54 A4 --- VeenClass van der Veen & Habing class
(1988A&A...194..125V 1988A&A...194..125V)
56 A1 --- Ident [CSI] Identifications indicated in
table4.dat (1)
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Note (1): C: Identification in CGCS (Cat. III/156)
S: Identification in GCSS (Cat. III/60)
I: No identifications in CGCS or GCSS catalogues
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IRAS IRAS name
12- 17 A6 --- GCVS General Catalogue of Variable Stars
(Kholopov et al., 1985, Cat. II/139)
19- 24 I6 --- TMSS ? Two Micron Sky Survey (Cat. II/2)
27- 31 A5 --- RAFGL Revised Air Force Geophysics Laboratory
Infrared Sky Survey (Cat. II/94)
33- 36 A4 --- CGCS Stephenson 1989, General Catalog of Cool
Galactic Carbon Stars (Cat. III/156)
or Stephenson 1976, Cat. III/60 for
number preceded by an S
38- 66 A29 --- Other Other names (1)
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Note (1): CNS: Catalog of nearby stars (Gliese 1969), Cat. V/35
DO: Dearborn Observatory Catalogue of Faint Red Stars
(Lee et al. 1943, 1944, 1947) Cat. II/68
EIC: Equatorial Infrared Catalogue (Sweeney et al. 1978) Cat. II/161
SAO: Smithsonian Astrophysical Observatory Star Catalog
(Smithsonian Institution 1966) See Cat. I/131
NCSV: New Catalogue of Suspected Variable Stars (Kukarkin et al. 1981)
Cat. II/140
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Acknowledgements: Thibaut Le Bertre
(End) Patricia Bauer [CDS] 20-Feb-1998